understand the state of the art on this topic and that astrobioethics can help us not only on how we should relate with extraterrestrial lifeforms, but even with terrestrials.

Chon-Torres, O.A., 2020. Moral challenges of going to Mars under the presence of non-intelligent life scenario. International Journal of Astrobiology 19, 49-52.

https://doi.org/10.1017/S1473550419000156 Much is discussed what would be the ideal position in terms of our ethical treatment with respect to other forms of life, particularly those that can be discovered in other worlds, in addition to our role in terms of the expansion of terrestrial life in the universe. This represents a great philosophical challenge, but what if we should make a moral decision in the face of the inevitable situation of being forced to colonize, for example, Mars? Is there a position in which we can feel safe to act legitimately? This paper tries to force us into a mental and conceptual exercise about what can really be worth beyond the concept or the positions we may have and analyse them in light of the practicality that decision making requires in this problem.

Choudhary, N., Narayanan Nair, A.K., Che Ruslan, M.F.A., Sun, S., 2019. Bulk and interfacial properties of decane in the presence of carbon dioxide, methane, and their mixture. Scientific Reports 9, 19784.

https://doi.org/10.1038/s41598-019-56378-y Molecular dynamics simulations were performed to study the bulk and interfacial properties of methane + n - decane, carbon dioxide + n - decane, and methane +carbon dioxide + n -decane systems under geological conditions. In addition, theoretical calculations using the predictive Peng-Robinson equation of state and density gradient theory are carried out to compare with the simulation data. A key finding is the preferential dissolution in the decane-rich phase and adsorption at the interface for carbon dioxide from the methane/carbon dioxide mixture. In general, both the gas solubility and the swelling factor increase with increasing pressure and decreasing temperature. Interestingly, the methane solubility and the swelling of the methane + n -decane system are not strongly influenced by temperature. Our results also show that the presence of methane increases the interfacial tension (IFT) of the carbon dioxide + n -decane system. Typically, the IFT of the studied systems decreases with increasing pressure and temperature. The relatively higher surface excess of the carbon dioxide + n -decane system results in a steeper decrease in its IFT as a function of pressure. Such systematic investigations may help to understand the behavior of the carbon dioxide-oil system in the presence of impurities such as methane for the design and operation of carbon capture and storage and enhanced oil recovery processes.

Ci, X., Zhang, H., Niu, Q., Zhu, D., Kang, S., Hu, J., Zhang, L., Zhang, J., He, K., 2019. Analysis of tight oil and gas charging characteristics by the carbon isotope field detection technology:A case study of the northern slope of the Minfeng sub-sag in the Bohai Bay Basin. Natural Gas Industry 39, 10-17.

http://oversea.cnki.net/kcms/detail/detail.aspx?dbCode=cjfd&QueryID=14&CurRec=6&filename=TRQG20191 1006&dbname=CJFDLAST2019 In Chinese. Studying hydrocarbon charging is quite important for searching exploration targets and confirming well locations. In this paper, the north slope of the Minfeng sub-sag in the Bohai Bay Basin was taken as an example. The wells Yanxie 233, Yongxie 932 and Yan 22 were selected for on-site carbon isotope detection. Then, based on sufficient carbon isotope data which were acquired on the drilling site using the brand-new carbon isotopic measuring instrument, the carbon isotope data and composition data of natural gas produced in this area were compared. And combined with the evolution of source rocks, the geochemical characteristics of crude oil, the depositional environment of reservoirs and the physical properties, single-well charging characteristics and regional charging area of natural gas were analyzed. Finally, the feasibility of on-site carbon isotope detection method to discriminate hydrocarbon charging was discussed. And the following research results were obtained. First, deep hydrocarbon charging happened in the lower fourth Member of Shahejie Formation in Well Yanxie 233, and its natural gas is the mixture of the oil cracking gas of deep layers and the